I agree with your observation that "changing churches" ends up being "leaving church altogether,"

but your assessment that the church hasn't changed isn't necessarily true, even within the parameters of the qualifier, "Biblical Church." The institutionalization and designations of separate denominations, churches have vastly changed from the first century into something, in my opinion, the Apostles wouldn't even recognize as Biblical assemblies of Born Again Bible Believing Disciples.// Form, but no substance.